Technical Data:
Digital outside groove calipers
Non waterproof
Measure grooves and recesses in small spaces
Resolution: 0.01mm/0.0005in
Buttons: on/off, zero, mm/inch
Automatic power off, move the digital unit to turn on power
Battery: CR2032
Made of stainless steel
Range: 0-100mm/0-4in
Accuracy: +/-0.03mm

Dimensions:
Overall length=200mm
Drawing dimensions (unlabeled)=16mm; 40mm; 3.5mm; 5.4mm; 3.5mm; 13.2mm; 4mm

Remark:
Built-in wireless; receiver code 7315-2/3/6/7/8/9 is needed